Use the slider to control the filling level of the tanks
From left to right: 'none', 'cylinder', 'cylinder' orange, 'water', 'water' green, 'pellets', 'cylinder'
The last one will have different colors depending on the value <80: red, 80-99: yellow, 100-154: green, 155-199: yellow, >=200: red
If you want to set an individual width to the tank, add a line to your "visu.css" with
#PAGE-ID (current pagename, hyphen, id of the tank-widget).
For example for tank 6: